delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass Inline) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass Inline) at bb106[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass UninhabitedEnumBranching) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass UninhabitedEnumBranching) at bb106[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass UninhabitedEnumBranching) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass UninhabitedEnumBranching) at bb106[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass UnreachablePropagation) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass UnreachablePropagation) at bb106[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass UnreachablePropagation) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass UnreachablePropagation) at bb106[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyCfg-after-uninhabited-enum-branching) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyCfg-after-uninhabited-enum-branching) at bb106[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyCfg-after-uninhabited-enum-branching) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyCfg-after-uninhabited-enum-branching) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass RemoveStorageMarkers) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass RemoveStorageMarkers) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass RemoveStorageMarkers) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass RemoveStorageMarkers) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass RemoveZsts) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass RemoveZsts) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass RemoveZsts) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass RemoveZsts) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass NormalizeArrayLen) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass NormalizeArrayLen) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass NormalizeArrayLen) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass NormalizeArrayLen) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass RemoveUnneededDrops) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass RemoveUnneededDrops) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass RemoveUnneededDrops) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass RemoveUnneededDrops) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass ReferencePropagation) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass ReferencePropagation) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass ReferencePropagation) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass ReferencePropagation) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass ScalarReplacementOfAggregates) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass ScalarReplacementOfAggregates) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass ScalarReplacementOfAggregates) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass ScalarReplacementOfAggregates) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass MatchBranchSimplification) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass MatchBranchSimplification) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass MatchBranchSimplification) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass MatchBranchSimplification) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass MultipleReturnTerminators) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass MultipleReturnTerminators) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass MultipleReturnTerminators) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass MultipleReturnTerminators) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass InstSimplify) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass InstSimplify) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass InstSimplify) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass InstSimplify) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyLocals-before-const-prop) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyLocals-before-const-prop) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyLocals-before-const-prop) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyLocals-before-const-prop) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass CopyProp) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass CopyProp) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass CopyProp) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass CopyProp) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass ConstProp) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass ConstProp) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass ConstProp) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass ConstProp) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass GVN) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass GVN) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass GVN) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass GVN) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyLocals-after-value-numbering) at bb93[11]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyLocals-after-value-numbering) at bb105[0]:
StorageLive(_308) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyLocals-after-value-numbering) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyLocals-after-value-numbering) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass DataflowConstProp) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass DataflowConstProp) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass DataflowConstProp) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass DataflowConstProp) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass ConstDebugInfo) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass ConstDebugInfo) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass ConstDebugInfo) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass ConstDebugInfo) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyConstCondition-after-const-prop) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyConstCondition-after-const-prop) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyConstCondition-after-const-prop) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyConstCondition-after-const-prop) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass JumpThreading) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass JumpThreading) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass JumpThreading) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass JumpThreading) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyComparisonIntegral) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyComparisonIntegral) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyComparisonIntegral) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyComparisonIntegral) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass DeadStoreElimination) at bb93[11]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass DeadStoreElimination) at bb105[0]:
StorageLive(_306) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass DeadStoreElimination) at bb93[11]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass DeadStoreElimination) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass DestinationPropagation) at bb93[11]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass DestinationPropagation) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass DestinationPropagation) at bb91[11]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass DestinationPropagation) at bb103[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyConstCondition-final) at bb91[11]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyConstCondition-final) at bb103[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyConstCondition-final) at bb91[11]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyConstCondition-final) at bb103[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass RemoveNoopLandingPads) at bb91[11]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass RemoveNoopLandingPads) at bb103[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass RemoveNoopLandingPads) at bb91[11]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass RemoveNoopLandingPads) at bb103[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyCfg-final) at bb91[11]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyCfg-final) at bb103[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyCfg-final) at bb88[11]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyCfg-final) at bb100[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyLocals-final) at bb88[11]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass SimplifyLocals-final) at bb100[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyLocals-final) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass SimplifyLocals-final) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass MultipleReturnTerminators) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass MultipleReturnTerminators) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass MultipleReturnTerminators) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass MultipleReturnTerminators) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass DeduplicateBlocks) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass DeduplicateBlocks) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass DeduplicateBlocks) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass DeduplicateBlocks) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass EnumSizeOpt) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass EnumSizeOpt) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass EnumSizeOpt) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass EnumSizeOpt) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass AddCallGuards) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass AddCallGuards) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass AddCallGuards) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass AddCallGuards) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass PreCodegen) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (before pass PreCodegen) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass PreCodegen) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after pass PreCodegen) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after phase change to runtime-optimized) at bb88[11]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:165:13
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1069 ~ tokio[4048]::sync::broadcast::{impl#14}::blocking_recv)) (after phase change to runtime-optimized) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:165:13
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass Inline) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass Inline) at bb106[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass UninhabitedEnumBranching) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass UninhabitedEnumBranching) at bb106[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass UninhabitedEnumBranching) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass UninhabitedEnumBranching) at bb106[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass UnreachablePropagation) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass UnreachablePropagation) at bb106[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass UnreachablePropagation) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass UnreachablePropagation) at bb106[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyCfg-after-uninhabited-enum-branching) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyCfg-after-uninhabited-enum-branching) at bb106[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyCfg-after-uninhabited-enum-branching) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyCfg-after-uninhabited-enum-branching) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass RemoveStorageMarkers) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass RemoveStorageMarkers) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass RemoveStorageMarkers) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass RemoveStorageMarkers) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass RemoveZsts) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass RemoveZsts) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass RemoveZsts) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass RemoveZsts) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass NormalizeArrayLen) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass NormalizeArrayLen) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass NormalizeArrayLen) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass NormalizeArrayLen) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass RemoveUnneededDrops) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass RemoveUnneededDrops) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass RemoveUnneededDrops) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass RemoveUnneededDrops) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass ReferencePropagation) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass ReferencePropagation) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass ReferencePropagation) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass ReferencePropagation) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass ScalarReplacementOfAggregates) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass ScalarReplacementOfAggregates) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass ScalarReplacementOfAggregates) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass ScalarReplacementOfAggregates) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass MatchBranchSimplification) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass MatchBranchSimplification) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass MatchBranchSimplification) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass MatchBranchSimplification) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass MultipleReturnTerminators) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass MultipleReturnTerminators) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass MultipleReturnTerminators) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass MultipleReturnTerminators) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass InstSimplify) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass InstSimplify) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass InstSimplify) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass InstSimplify) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyLocals-before-const-prop) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyLocals-before-const-prop) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyLocals-before-const-prop) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyLocals-before-const-prop) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass CopyProp) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass CopyProp) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass CopyProp) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass CopyProp) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass ConstProp) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass ConstProp) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass ConstProp) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass ConstProp) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass GVN) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass GVN) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass GVN) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass GVN) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyLocals-after-value-numbering) at bb93[1]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyLocals-after-value-numbering) at bb105[0]:
StorageLive(_307) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyLocals-after-value-numbering) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyLocals-after-value-numbering) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass DataflowConstProp) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass DataflowConstProp) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass DataflowConstProp) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass DataflowConstProp) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass ConstDebugInfo) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass ConstDebugInfo) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass ConstDebugInfo) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass ConstDebugInfo) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyConstCondition-after-const-prop) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyConstCondition-after-const-prop) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyConstCondition-after-const-prop) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyConstCondition-after-const-prop) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass JumpThreading) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass JumpThreading) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass JumpThreading) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass JumpThreading) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyComparisonIntegral) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyComparisonIntegral) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyComparisonIntegral) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyComparisonIntegral) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass DeadStoreElimination) at bb93[1]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass DeadStoreElimination) at bb105[0]:
StorageLive(_305) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass DeadStoreElimination) at bb93[1]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass DeadStoreElimination) at bb105[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass DestinationPropagation) at bb93[1]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass DestinationPropagation) at bb105[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass DestinationPropagation) at bb91[1]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass DestinationPropagation) at bb103[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyConstCondition-final) at bb91[1]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyConstCondition-final) at bb103[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyConstCondition-final) at bb91[1]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyConstCondition-final) at bb103[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass RemoveNoopLandingPads) at bb91[1]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass RemoveNoopLandingPads) at bb103[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass RemoveNoopLandingPads) at bb91[1]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass RemoveNoopLandingPads) at bb103[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyCfg-final) at bb91[1]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyCfg-final) at bb103[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyCfg-final) at bb88[1]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyCfg-final) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyLocals-final) at bb88[1]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass SimplifyLocals-final) at bb100[0]:
StorageLive(_304) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyLocals-final) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass SimplifyLocals-final) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass MultipleReturnTerminators) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass MultipleReturnTerminators) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass MultipleReturnTerminators) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass MultipleReturnTerminators) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass DeduplicateBlocks) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass DeduplicateBlocks) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass DeduplicateBlocks) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass DeduplicateBlocks) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass EnumSizeOpt) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass EnumSizeOpt) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass EnumSizeOpt) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass EnumSizeOpt) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass AddCallGuards) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass AddCallGuards) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass AddCallGuards) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass AddCallGuards) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass PreCodegen) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (before pass PreCodegen) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass PreCodegen) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after pass PreCodegen) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after phase change to runtime-optimized) at bb88[1]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:165:13
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1231 ~ tokio[4048]::sync::mpsc::bounded::{impl#0}::blocking_recv)) (after phase change to runtime-optimized) at bb100[0]:
StorageLive(_303) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:165:13
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass Inline) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass Inline) at bb114[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass UninhabitedEnumBranching) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass UninhabitedEnumBranching) at bb114[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass UninhabitedEnumBranching) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass UninhabitedEnumBranching) at bb114[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass UnreachablePropagation) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass UnreachablePropagation) at bb114[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass UnreachablePropagation) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass UnreachablePropagation) at bb114[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass SimplifyCfg-after-uninhabited-enum-branching) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass SimplifyCfg-after-uninhabited-enum-branching) at bb114[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass SimplifyCfg-after-uninhabited-enum-branching) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass SimplifyCfg-after-uninhabited-enum-branching) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass RemoveStorageMarkers) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass RemoveStorageMarkers) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass RemoveStorageMarkers) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass RemoveStorageMarkers) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass RemoveZsts) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass RemoveZsts) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass RemoveZsts) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass RemoveZsts) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass NormalizeArrayLen) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass NormalizeArrayLen) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass NormalizeArrayLen) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass NormalizeArrayLen) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass RemoveUnneededDrops) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass RemoveUnneededDrops) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass RemoveUnneededDrops) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass RemoveUnneededDrops) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass ReferencePropagation) at bb93[5]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass ReferencePropagation) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass ReferencePropagation) at bb93[4]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass ReferencePropagation) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass ScalarReplacementOfAggregates) at bb93[4]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass ScalarReplacementOfAggregates) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass ScalarReplacementOfAggregates) at bb93[4]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass ScalarReplacementOfAggregates) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass MatchBranchSimplification) at bb93[4]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass MatchBranchSimplification) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass MatchBranchSimplification) at bb93[4]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (after pass MatchBranchSimplification) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:148:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass MultipleReturnTerminators) at bb93[4]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  64: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  65: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  66: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  67: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:9
  68: <rustc_interface::queries::QueryResult<&rustc_middle::ty::context::GlobalCtxt>>::enter::<core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>, <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:68:9
  69: <rustc_interface::queries::Queries>::ongoing_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:192:9
  70: rustc_driver_impl::run_compiler::{closure#1}::{closure#2}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:478:35
  71: <rustc_interface::interface::Compiler>::enter::<rustc_driver_impl::run_compiler::{closure#1}::{closure#2}, core::result::Result<core::option::Option<rustc_interface::queries::Linker>, rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:330:19
  72: rustc_driver_impl::run_compiler::{closure#1}
             at /home/ben/rust-master/compiler/rustc_driver_impl/src/lib.rs:409:22
  73: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:489:21
  74: rustc_span::set_source_map::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:1057:5
  75: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/interface.rs:483:13
  76: rustc_interface::util::run_in_thread_pool_with_globals::<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:117:13
  77: <scoped_tls::ScopedKey<rustc_span::SessionGlobals>>::set::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/scoped-tls-1.0.1/src/lib.rs:137:9
  78: rustc_span::create_session_globals_then::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_span/src/lib.rs:129:5
  79: rustc_interface::util::run_in_thread_with_globals::<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/util.rs:79:38
  80: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/sys_common/backtrace.rs:154:18
  81: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:529:17
  82: <core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  83: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  84: std::panicking::try::<core::result::Result<(), rustc_span::ErrorGuaranteed>, core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  85: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}::{closure#0}>, core::result::Result<(), rustc_span::ErrorGuaranteed>>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  86: <std::thread::Builder>::spawn_unchecked_::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1}
             at /home/ben/rust-master/library/std/src/thread/mod.rs:528:30
  87: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#1}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  88: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  89: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /home/ben/rust-master/library/alloc/src/boxed.rs:2007:9
  90: std::sys::unix::thread::Thread::new::thread_start
             at /home/ben/rust-master/library/std/src/sys/unix/thread.rs:108:17
  91: <unknown>
  92: <unknown>

delayed span bug: broken MIR in Item(DefId(0:1247 ~ tokio[4048]::sync::mpsc::bounded::{impl#3}::blocking_send)) (before pass MultipleReturnTerminators) at bb113[0]:
StorageLive(_309) which already has storage here
   0: <rustc_errors::HandlerInner>::emit_diagnostic
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1340:29
   1: <rustc_errors::HandlerInner>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1624:9
   2: <rustc_errors::Handler>::delay_span_bug::<rustc_span::span_encoding::Span, alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_errors/src/lib.rs:1010:9
   3: <rustc_const_eval::transform::validate::CfgChecker>::fail::<alloc::string::String>
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:133:9
   4: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_statement
   5: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:309:21
   6: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_basic_block_data
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:90:17
   7: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::super_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:294:17
   8: <rustc_const_eval::transform::validate::CfgChecker as rustc_middle::mir::visit::Visitor>::visit_body
             at /home/ben/rust-master/compiler/rustc_middle/src/mir/visit.rs:1205:1
   9: <rustc_const_eval::transform::validate::Validator as rustc_middle::mir::MirPass>::run_pass
             at /home/ben/rust-master/compiler/rustc_const_eval/src/transform/validate.rs:91:21
  10: rustc_mir_transform::pass_manager::validate_body
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:173:5
  11: rustc_mir_transform::pass_manager::run_passes_inner
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:132:17
  12: rustc_mir_transform::pass_manager::run_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/pass_manager.rs:83:5
  13: rustc_mir_transform::run_optimization_passes
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:565:5
  14: rustc_mir_transform::inner_optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:664:5
  15: rustc_mir_transform::optimized_mir
             at /home/ben/rust-master/compiler/rustc_mir_transform/src/lib.rs:626:21
  16: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:586:47
  17: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:510:18
  18: rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:582:25
  19: <rustc_query_impl::query_impl::optimized_mir::dynamic_query::{closure#2} as core::ops::function::FnOnce<(rustc_middle::ty::context::TyCtxt, rustc_span::def_id::DefId)>>::call_once
             at /home/ben/rust-master/library/core/src/ops/function.rs:250:5
  20: <rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false> as rustc_query_system::query::config::QueryConfig<rustc_query_impl::plumbing::QueryCtxt>>::compute
             at /home/ben/rust-master/compiler/rustc_query_impl/src/lib.rs:119:9
  21: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:72
  22: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  23: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::try_with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:270:16
  24: <std::thread::local::LocalKey<core::cell::Cell<*const ()>>>::with::<rustc_middle::ty::context::tls::enter_context<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/library/std/src/thread/local.rs:246:9
  25: rustc_middle::ty::context::tls::enter_context::<rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:79:9
  26: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:151:13
  27: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  28: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  29: rustc_middle::ty::context::tls::with_context_opt::<rustc_middle::ty::context::tls::with_context<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  30: rustc_middle::ty::context::tls::with_context::<rustc_middle::ty::context::tls::with_related_context<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  31: rustc_middle::ty::context::tls::with_related_context::<<rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  32: <rustc_query_impl::plumbing::QueryCtxt as rustc_query_system::query::QueryContext>::start_query::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::execute_job_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:136:9
  33: rustc_query_system::query::plumbing::execute_job_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:467:18
  34: rustc_query_system::query::plumbing::execute_job::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:400:9
  35: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:343:13
  36: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:32
  37: stacker::maybe_grow::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/.cargo/registry/src/index.crates.io-6f17d22bba15001f/stacker-0.1.15/src/lib.rs:55:9
  38: rustc_data_structures::stack::ensure_sufficient_stack::<rustc_middle::query::erase::Erased<[u8; 8]>, rustc_query_system::query::plumbing::get_query_non_incr<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/stack.rs:17:5
  39: rustc_query_system::query::plumbing::get_query_non_incr::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt>
             at /home/ben/rust-master/compiler/rustc_query_system/src/query/plumbing.rs:799:5
  40: rustc_query_impl::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
             at /home/ben/rust-master/compiler/rustc_query_impl/src/plumbing.rs:560:26
  41: rustc_middle::query::plumbing::query_get_at::<rustc_query_system::query::caches::DefaultCache<rustc_span::def_id::DefId, rustc_middle::query::erase::Erased<[u8; 8]>>>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:156:17
  42: <rustc_middle::query::plumbing::TyCtxtAt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:438:31
  43: <rustc_middle::ty::context::TyCtxt>::optimized_mir::<rustc_span::def_id::LocalDefId>
             at /home/ben/rust-master/compiler/rustc_middle/src/query/plumbing.rs:429:17
  44: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_mir
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:1625:74
  45: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root::{closure#15}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:622:29
  46: <rustc_metadata::rmeta::encoder::EncodeContext>::encode_crate_root
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:583:27
  47: rustc_metadata::rmeta::encoder::encode_metadata_impl
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2252:16
  48: rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2202:12
  49: <core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}> as core::ops::function::FnOnce<()>>::call_once
             at /home/ben/rust-master/library/core/src/panic/unwind_safe.rs:272:9
  50: std::panicking::try::do_call::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panicking.rs:552:40
  51: std::panicking::try::<(), core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>>
             at /home/ben/rust-master/library/std/src/panicking.rs:516:19
  52: std::panic::catch_unwind::<core::panic::unwind_safe::AssertUnwindSafe<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>, ()>
             at /home/ben/rust-master/library/std/src/panic.rs:142:14
  53: <rustc_data_structures::sync::parallel::ParallelGuard>::run::<(), rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:26:9
  54: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:65:21
  55: rustc_data_structures::sync::parallel::parallel_guard::<(core::option::Option<()>, core::option::Option<()>), rustc_data_structures::sync::parallel::disabled::join<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>::{closure#0}>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:39:15
  56: rustc_data_structures::sync::parallel::disabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:64:22
  57: rustc_data_structures::sync::parallel::enabled::join::<rustc_metadata::rmeta::encoder::encode_metadata::{closure#0}, rustc_metadata::rmeta::encoder::encode_metadata::{closure#1}, (), ()>
             at /home/ben/rust-master/compiler/rustc_data_structures/src/sync/parallel.rs:155:13
  58: rustc_metadata::rmeta::encoder::encode_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/rmeta/encoder.rs:2201:5
  59: rustc_metadata::fs::encode_and_write_metadata
             at /home/ben/rust-master/compiler/rustc_metadata/src/fs.rs:65:13
  60: rustc_interface::passes::start_codegen
             at /home/ben/rust-master/compiler/rustc_interface/src/passes.rs:931:44
  61: <rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}
             at /home/ben/rust-master/compiler/rustc_interface/src/queries.rs:203:16
  62: <rustc_middle::ty::context::GlobalCtxt>::enter::<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::Any>, rustc_span::ErrorGuaranteed>>::{closure#0}
             at /home/ben/rust-master/compiler/rustc_middle/src/ty/context.rs:607:37
  63: rustc_middle::ty::context::tls::enter_context::<<rustc_middle::ty::context::GlobalCtxt>::enter<<rustc_interface::queries::Queries>::ongoing_codegen::{closure#0}, core::result::Result<alloc::boxed::Box<dyn core::any::